Robot vacuum cleaner



1. Robot vacuum cleaner

1.1 is a perspective view of a robot vacuum cleaner showing our new design;

1.2 is a front elevation view thereof;

1.3 is a rear elevation view thereof;

1.4 is a left-side elevation view thereof;

1.5 is a right-side elevation view thereof;

1.6 is a top plan view thereof; and

1.7 is a bottom plan view thereof. 

CLAIM The ornamental design for a robot vacuum cleaner, as shown and described. 